Swindon are likely to be without Vincent Pericard for the visit of Colchester as the striker battles to recover from yet another injury.
Pericard has struggled to string a consistent spell of games together since arriving at the County Ground from Carlisle at the start of the year.
His latest setback came shortly before half-time during Tuesday`s Johnstone`s Paint Trophy exit to Brentford when he was substituted nursing a groin problem.
Captain Jonathan Douglas (broken toe) returned to training on Thursday but Saturday`s encounter is also likely to come too soon for him.
Fellow midfielder Simon Ferry, centre-back Andy Frampton (both ankle) and full-back Kevin Amankwaah (knee) will definitely miss out as they continue their respective recoveries.
The Robins desperately need to find some consistency this term but will find the going tough against third-placed Colchester, who have yet to lose on their travels.
Magnus Okuonghae and Ian Henderson are pushing to return to the Colchester squad.
Centre-half Okuonghae has been sidelined for almost a month with an ankle injury but played 45 minutes in a behind-closed-doors friendly this week.
Striker Henderson has also trained this week after missing Saturday's FA Cup win over Bradford with a knee problem.
Winger Simon Hackney is still out with a back injury, although he is back running and is likely to be loaned out by manager John Ward to get some games once he is fit enough.
Forward Steven Gillespie is also in the treatment room with a thigh problem along with long-termers John-Joe O'Toole and Morten Knudsen (both knee).
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